Joint for connecting pipe-sections.



P. J. McGABE.

JOINT FOR CONNECTING PIPE SECTIONS.

APPLICATION FILED NOV. 16, 1909.

Patented NOV.8,1910.

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N1 NM b\ N NM NW n TED ans a'rnn'r FMQ PHILIP J. MOCABE, OF GARY, INDIANA, ASSIGNOR OF ONE-HALF T0 JOHN P. VAN

SYCKLE, OF GALENA, ILLINOIS.

JOINT FOR CONNECTING PIPE-SECTIONS.

Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed November 16, 1909. Serial No. 528,423.

To all whom it may concern:

Be it known that I, PHILIP J. MoCABn, a citizen of the United States, and a resident of Gary, in the county of Lake and State of Indiana, have inventeda certain new and useful Improvement in-Joints for Connecting Pipe-Sections; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in pipe couplings and has for its object to provide a"very simple and eificient device of this character whereby the pipe sections may be securely coupled together without necessitatingthe cutting of screw threads on the ends of said pipe sections or otherwise preparing the same for the engagement of the coupling thereon.

A furtherwobject of the invention resides in the provision of a coupling which is especially adapted for connecting the sections of conduits for electrical wiring whereby a water-tight joint is provided and the liability of the leakage of moisture to the in terior of the conduit is entirely eliminated.

With these and other objects in view the invention consists of the novel features of construction, combination and arrangement of parts hereinafter fully described and claimed and illustrated in the accompanying drawings, in which- Figure 1 is a view partly in section showing the adjacent ends of two pipe sections connected by my improved coupling; Fig. 2 is a longitudinal section of the coupling sleeve; Fig. 3 is an end elevation thereof; Fig. 4 is a side elevation ofthe clampmg nut forming a part of the coupling; and Fig. 5 is a side elevation of the tapering split ring comprising one of the clamping members.

Referring morev particularly to the drawings 10-10indicate the two p1pe sections the adjacent ends of which are connected or coupled by the improved coupling embodied in the present invention.

This coupling comprises a sleeve 11 which is disposed upon the opposed ends of the pipe sections. This sleeve is interiorly threaded at each end as shown at 12, said threaded ends of the sleeve being of considerably greater diameter than the pipe sections 10. The inner wall of thesleeve 11 is tapered inwardly toward the center of said sleeve from the threaded ends 12, orin other words, the bore of the sleeve is conically formed beyond said threaded ends as shown at 13. Adjacent to the center of the sleeve these walls 13 are longitudinally extended in parallel relation to the major axis of the sleeve as at 14 to provide short annular shoulders which form seats for the extremities of the pipe sections 10. An annular rib or flange 15 is formed in the sleeve 11 be tween said seats and spaces the opposed ends ings 16 are split as shown at 20 so as to permit the sameto expand whereby they may be positioned over the ends of the pipe sections; The ends of the bushings are slightly separated upon each side of the center of said bushing. The cuts or slits 20 extend angularly to provide an intermediate shoulder upon each end of the bushing. These shoulders engage upon each other and are relatively movable. 'Clamping nuts 18 are adapted to be threaded into the ends of the sleeve 11 and to engage with the bushings 16. As the bushings are forced into binding engagement upon the conical bore portions 13 of the sleeve, the separated end walls thereof are drawn together so that the bushings are contracted upon the ends of the pipe sections. By roviding the irregularly extending slits 20 in the bushings, moisture is more eflectually excluded from the interior of the pipe sections than would be possible if these slots extended directly from end to end of the bushings. As the clamping nuts 18 are threaded into the ends of the sleeve, the bushings 16 bind upon the periphery of the pipe sections 10 and rigidly hold said pipe sections in the sleeve against longitudinal movement. The clamping nuts are formed at their outer ends with angular flanges 19 whereby a wrench or other implement may be applied so that the nuts may be readily threaded into orout of the ends of the sleeve.

In the application of the coupling, the

clamping nuts 18 and the tapering collars or bushings 16 are disposed upon the ends of the pipe sections to be connected. The

pipe sections are then inserted into the opposite ends .of the sleeve 11 and their extremithe ends of the sleeve 11 and as they move inwardly the bushings 16 are adually brought into close binding or frictional engagement between the conical bore portions 13 of the sleeve and the periphery of the ipe sections 10. Upon the continued adustment of the nuts 18, these bushings are contracted at their ends and drawn together, whereby they securely grip the pipe sections and lock them and the coupling sleeve together. All parts of the coupling and the ipe sections are thus held against relative ongitudinal or rotative movement.

In order to obviate the liability of the screw threads on the clamping nuts 19 contacting with the conical bore portions 13 of the sleeve, the inner ends of said nuts are reduced to substantially the same thickness as the greatest thickness of the bushings 16. This reduced portion may be conveniently formed by simply cutting oif several of the screw threads thereform. Thus the threads on the nuts 18 will notengage with the tapered or inclined" walls of the sleeves, while at the same time the split bushings are forced into secure binding engagement upon the pipe section.

It will of course be understood that my invention is adapted to be applied to various forms of piping systems. For instance the coupling sleeve 11 may be provided at one end with screw threads to form a stationary joint or connection and at its other end with a joint or coupling embodying my invention. The coupling sleeve may be made in many different forms in order to adapt the invention to application on the different fiterases tings or pipe connections. Many other modifications may also be resorted to without materially departing from the essential feature or sacrificing any of the advantages of the invention.

I claim- The herein described pipe coupling comprising in combination the following elements, to-wit:-a sleeve dis osed upon and connecting the end of two pipe sections, the bore of said sleeve at each end bein threaded, said bore being conically 'forme inwardly of the threaded portions thereof to a oint adj acentto the center of the sleeve, sa1 conical bore portions adually decreasing in diameter from their outer to their inner engagement with one of the conical portions .pipe sections.

of the bore of the sleeve, a clamping nut threaded into each end of the sleeve adapted to force said bushing inwardly to frictionally engage the same with the walls of the conical portions of the bore of said sleeve said nuts extending beyond the threade portions of the bore of the sleeve and being of reduced diameter to force the bushings inwardly to the full extent of their-move.

ment and contract said bushings upon the In testimony, that I claiii the' foregoing as my invention I aflix my-si nature in the presence of two witnesses, this 11th day of November A. D. 1909.

PHILIP J. MoCABE.

Signed in presence of- J. ALVIN ODoNNELL, E. MILES NORTON.

ends, an annular rib centrally formed in said sleeve and separating the conically formed 

